I2s muliplexer
About the I2s muliplexer PCB
I2s muliplexer is an open source PCB design by adoble, published on GitHub. It is a 2-layer board measuring 72 × 67 mm, with 29 components from 9 distinct parts.
Other key parts include the 74HC244, 74HC126 and 74LS138. By type, the board carries 10 capacitors, 8 connectors, 6 resistors and 5 ICs.
It belongs with the audio designs in this gallery.
From the project
A digital modular audio system
This module routes I2S signals up to 6 sources to the amplifier module - see the module overview.
Each I2S signal (BCLK, LRCLK, DATA, MCLK) belonging to source are routed through the same buffers so has to minimise differences in buffer propagation delays and with it, differences in the relative timing of the signals with one another. Each I2S signal belonging to a source have the the same track length - gain to moinimisd differences in the relative timing of the signals with one another.
Main components on the I2s muliplexer
I2s muliplexer bill of materials (BOM)
29 components, 9 distinct parts.
| Qty | Part | Footprint | Refs |
|---|---|---|---|
| 3 | 74HC244 | SOIC-20W_7.5x12.8mm_P1.27mm | U1, U2, U3 |
| 1 | 74HC126 | SOIC-14_3.9x8.7mm_P1.27mm | U4 |
| 1 | 74LS138 | SOIC-16_3.9x9.9mm_P1.27mm | U5 |
| 6 | Conn_02x04_Odd_Even | PinHeader_2x04_P2.54mm_Vertical | J1, J2, J3, J4, J5, J6 |
| 1 | Conn_01x06 | PinHeader_1x06_P2.54mm_Vertical | J7 |
| 1 | Conn_01x05 | PinHeader_1x05_P2.54mm_Vertical | J8 |
| 5 | 10u | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C1, C3, C4, C7, C8 |
| 5 | 100n | C_0805_2012Metric_Pad1.18x1.45mm_HandSolder | C2, C5, C6, C9, C10 |
| 6 | 10K | R_0805_2012Metric_Pad1.20x1.40mm_HandSolder | R1, R2, R3, R4, R5, R7 |
I2s muliplexer design files
The KiCad project lives in the adoble/modular-audio repository on GitHub; these links point at the commit this page was built from.
I2s muliplexer: common questions
How big is the I2s muliplexer PCB?
The I2s muliplexer measures 72 × 67 mm, has 2 copper layers and is 1.6 mm thick.
How many components are on the I2s muliplexer?
29 components, from 9 distinct parts. The full bill of materials is listed on this page.
Where can I download the I2s muliplexer design files?
From the adoble/modular-audio repository on GitHub, which has the KiCad layout and the schematic; the links under Design files point to each one.
Can I use the I2s muliplexer design in my own project?
The repository has no license, so all rights stay with adoble. Use it as a reference, and ask the author before reusing the design.
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